Expansion-bolt.



' '15. W. BENNETT.

BXPANSMBOLT. APPLIOATION FILED APR. 15,1912.

PatentedA 001s. 2 2, 191.2.l

witnesses .UNITED STATES PATENT OFFICE.

DWIGHT WILSON BENNETT, OF SOlVfERTON. PENN SYLVANIA. ASSIGNORE ONE-THIRD TO BENJAMIN VAN SANT, 0F SOUTHAMPTON, PENNSYLVANIA.

EXPANSION-BOLT.

Patented Oct. 2.2, 1912.

Application led April 15` 1912. Serial No. 690,769.

To all whom 'it may concern:

Be. it known that I, DWIGHT WILSON BEN- NETT, a citizen of the United States, residing at- Somerton. in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Expansion-Bolts; and I do declare the following to be a full, Clear, and

exact description of' the invention, such,

as will enable others skilled in the art to which it appertains to make and use the same.

This invention is an expansion bolt; and

itsobject is toso construct the parts that the movement of the nut will expand the casing by Contact at three points with eachsection thereof.

A further object is to so Construct the nut and easing that their parts will not become disconnected as the device is handled'before it `is pnt in place.

Thes and other objects are carried out'by eonstrueting the parts as hereinafter more fully described and elaimed, and as shown in the drawings wherein- Figure 1 is a sideelevation of the bolt with its parts already inserted in the socket within whieh it is to be expanded. showing the screw in the art. ot' being put into place; Fig. 9 is a e lnlral vertical longitudinal see.- tional view of all parts. showing their relative position after the serew has been tightened up. Figs. 3. yt. 5 and tl are cross seetional views on the lines tlv-3, -t--l. 5 5 and (--t ot Fig. 1. Fig. 'T is a perspective detail ot' the inner ends ot' the casing members slightly separated.

In the drawings the numeral 1 designates a bolt having a head 2 at one end and a thread El extending from its other end toward the head. This bolt is adapted to be screwed into an expansion degieeeonsist'ing ot' a two-part mit l mounted lnovablv within a two-part tubular easing 5. The nut eonsists otI two similar senli-eonieal haltseetions (3 and T whose inner tares are grooved longitndinallr and threaded as at S to torni tht` bore ot' the nnt adapted to tit npon the threads I) ot' the bolt. Said sertions'are held in alinementwith eaeh other by providing the section T with two projecting lugs 5) adapted to enter recesses l0 t'ormed in the other seetion In addition1 eaeh -seetion of the nut is provided at its smaller end nexty its tlat edge which contacts with the other section, with a radially projecting spur 11, and When the two sections are assembled the spul-stort one lie against those on the other so that the smaller end ofv the conical nut has two diametrically opposite radial spu-rs as shown. 'l l The two half-sections ormembers 13 and 14 of the easing arel each semi-cylindrical in general contour, .and are of like size and vshape with the followingexoeptions: The

member 13 has a groove 15 around its outer face near its outer end, and ,the member 14 has two pliable fingers 16 whieh arebent. around the member 13 and into saidgroove. whereby the outer ends of -the members are .held together although they are vpermitted to yield slightly by reason of the pliability of-the fingers. At about its mid-length the 'zol member 13 hasv t-woside recesses 17,4v and' opposite thereto the member 14 has twoV additional pliable lingers 18 adapted to be Ybentfinto said recesses. whereby the centers of the members are lheld together but permitted to yield-slightly asthe pliability of these fingers will permit. 'From the midlength of these members toward their inner ends their contiguous edges diverge slightly as shown at 19, and aty its inner end the member 14 has a hook 2O at one side whose. bill has a flat inner tace 21 standing atright angles to the axial ,line of the easing. and a beveled outer'face Q4: and a hook 2Q at the other side whose bill has an inner face 23 which is oblique to said axial line and an outer faee 25 which is flat. Conversely the other member ot the easing is provided with similar hooks opposit'ely disposed. with the result that the beveled outer taee Q1 of each hook 0 having a right-angular inner tace normally eontaets with the beveled inner fare Sl ot the hook on the other member. .whereas the tlat fares 25 of the two hooks Q2 normall)v stand in line with the inner end ot the easing.

'l`he parts are assembled by plaeing the two nut-sertions together. then bringing the two members ot the easing together so that the spursl l1 on the nnt stand between the direi-ging edges l5) and behind .the rightangnlar bills 2l. and tinally bending the pliable tingersl lt and 1S into the groove 15 and the reeesses 17.- 'hen so associated. it will be lonnd that the lugs and recesses -hold the nut set-tions together as one. the hooks Q0 hold the nut in the casing, and the fingers hold the casing members together as one, andthe device'may be subjected to considerable rough usage without disassociating its parts. Hence it may be thrown into the tool boX and carried to the point of use, and

the inconvenience of having to assemble thel parts 4is avoided.

The use of expansion bolts is well known. The bolt is passed through the casing and its threads engaged with those in the nut, the casing and nut having first been inserted into the socket within which they are to be expanded, and when the bolt is rotated with its head in contact with the outer edge of the casing, the conical nut is drawn into the inner end thereof and the same is forced to expand. l The advantages arising from the specific construction described above will now be apparent. As the conical nut travels into the inner end of the casing. it contacts with the interior of `the twol members thereof, and

. simultaneously both prongs contact with the edges '19 thereof whichconverge toward the outer end of the casing-hence the nut expands the casing by contact at three points n with each section thereof, and the result is Copies of this patent may' belobtained for that the membersof the casing are spread apart with great force and this improved vexpansion bolt is therefore especially effective. Obviouslythe sizes and materials of parts are unimportant, and details may be altered to al'considerable extent while yet retaining the essential features. For i-nstance, other means than the pliable fingers may be employed for connecting the members ofthe casing' and for holding the nut in the inner end of the same, hooks of other shape might be utilized, or the right-angular hooks 2O employed without using the hooks 22 at all. I

What is claimed as new is: r y

l. In an expansion bolt, the combination with a substantially tubular casing made in twofmembers whose contiguous inner walls and edges diverge-toward their .inner ends;

of a two-part nut conical on itsexterior,

each part having .at its smaller end two raf dial prongs next its edge adapted to contact Awith the prongs on the companion part and to project through thespac'e between and into contact with the edges of said members.

2.y In an expansion bolt, the combination with a casing made in two members whose contiguous edges diverge toward their inner ends,A a hook on one edge' of each member projecting toward the other and having its inner face standing at right angles to the axis of the casing and its other face oblique thereto, and a second hook on the other, edge of said memberv having its inner face oblique to vmatch the oblique portion of the mating hook and its other face vfiat andiflush with the end of. the casing; ofa nut having two diametrically opposite radial prongs at one end adapted to project through the space between the edges of said members and to stand normally in contact with the hook faces whichstand at right angles to the aXis of the casing.

In testimony whereof l have hereunto set;

my hand in presence of two subscribing .wit-

nesses. I y

DWIGHT WILSON BENNETT.

Witnesses Giro. NEBEKER, REnvn HAMMELL.

ve cents each, *oyV addressing the "Commissioner of Patents, Washington, D. G. 

